package com.mashiguang.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.springframework.security.access.SecurityMetadataSource;
import org.springframework.security.access.intercept.AbstractSecurityInterceptor;
import org.springframework.security.access.intercept.InterceptorStatusToken;
import org.springframework.security.web.FilterInvocation;
import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;

public class MyFilterSecurityInterceptor extends AbstractSecurityInterceptor
		implements Filter {

	private FilterInvocationSecurityMetadataSource securityMetadataSource;
	 
	 public void doFilter( ServletRequest request, ServletResponse response, FilterChain chain)
	 throws IOException, ServletException{
	  
	  FilterInvocation fi = new FilterInvocation( request, response, chain );
	  invoke(fi);
	  
	 }
	 
	 public FilterInvocationSecurityMetadataSource getSecurityMetadataSource(){
	  return this.securityMetadataSource;
	 }
	 
	 public Class<? extends Object> getSecureObjectClass(){
	  return FilterInvocation.class;
	 }

	 
	 public void invoke( FilterInvocation fi ) throws IOException, ServletException{
	  
	  InterceptorStatusToken  token = super.beforeInvocation(fi);
	  
	  try{
	   fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
	  }finally{
	   super.afterInvocation(token, null);
	  }
	  
	 }
	  
	 
	 @Override
	 public SecurityMetadataSource obtainSecurityMetadataSource(){
	  return this.securityMetadataSource;
	 }
	 
	 
	 public void setSecurityMetadataSource(FilterInvocationSecurityMetadataSource securityMetadataSource){
	  this.securityMetadataSource = securityMetadataSource;
	 }
	 
	 
	 public void destroy(){
	  
	 }
	 
	 public void init( FilterConfig filterconfig ) throws ServletException{
	  
	 }

}
